Question

how life began origins nova neil degrasse tyson hd
which four chemical elements are highlighted as the most essential building blocks for life?
carbon, sodium, potassium, iron
carbon, sulfur, phosphorus, calcium
hydrogen, oxygen, carbon, nitrogen
hydrogen, helium, nitrogen, calcium

Explanation:

Hydrogen, oxygen, carbon, and nitrogen are fundamental for life. Carbon forms the backbone of organic molecules. Hydrogen and oxygen are in water (vital for life processes). Nitrogen is in amino acids (building blocks of proteins) and nucleic acids (like DNA). Other options have elements not as universally core - sodium, potassium, iron, sulfur, phosphorus, calcium, helium are either not as central in the basic molecular framework of life across all organisms or are less abundant in the most essential biomolecules.

Answer:

Hydrogen, oxygen, carbon, nitrogen